Pan for crushing mills



April 14, 1931. s. B. STINE PAN FOR CRUSHING MILLS iled Jan. 3. 1928 u j 9. B a 4 --mr--- m, 7 QMB m m a 5 {d 0 II hi y joints by an outside lap plate or strap which sections joined together at diametrally op- 75 Patented Apr. 14, 1931 1,800,705

UNITED'STATES PATENT OFFICE SAMUEL BLAINE STINE, OF OSCEOLA MILLS, PENNSYLVANIA PAN FOR CRUSHING MILLS Application filed. January 3, 192 8. Serial No. 244,140.

This invention relates broadly to grind- One object of my invention is to provide ing and mixing pans, and more particularly a pan structure having a rim provided with to pans of the type known as dry and wet a liner which is detachably connected therepans for the grinding and mixing of clay to, so that it may be readily removed and 5 and other material in the manufacture of replaced by a new liner. 5o bricks and refractories. Another object is to provide an improved Heretofore, the practice has been to conform or construction for pans of such charstruct these pans either entirely of cast acter as to effectually resist these stresses metal such as castiron of semi-steel, or part produced in working which tend to weaken [0 cast metal and part wrought metal, the botthe pan, and a further object is to provide tom and rim. portions of the pan being an improved form of connection between the formed separately and bolted or riveted torim and the bottom-portion of the pan. gether to form the complete pan. In the My lnvention may be readily understood partially cast and partially wrought pan, by reference to the accompanyingdrawing,

1:) the rim portion is made of wrought metal. WhlCh shows a preferred embodiment of my In the case of pan structures having rims invention, and in whichof cast metal, such rims may sometimes weigh Figure 1 is a top plan view, partly broken in the. neighborhood of twenty-five hundred away, of a pan constructed in accordance (2500) pounds. It frequently happens that with my invention; I

20 these rims have to be'discarded because they Fig. 2 is a vertical sectional view through have become worn for adistance of perhaps the side of the pan, taken on the line IIII only two or three inches upwardly from of Fig. 1; their bottom edges. Not only is consider- Fig. 3 is a view similar to Fig. 2, taken on able waste of material involved, but there is the line III-III of Fig. 1, and Fig. 4: is a -35 also a large amount of labor and time lost side elevational view of a portion of the pan incident to the making of such changes. at one of the joints.

In both forms, the rims are commonly In the present invention the pan is formed made in segments which are brought into with a rim portion 2 which preferably is abutting relation, and are connected at the made up of two semi-circular wrought metal is riveted or bolted to the segments. The posite points. Each section comprises a plurim as thus formed is bolted to the periphrality of wrought metal plates, which are eral edge of the pan bottom. suitably formed in bending rolls to give the In the form of construction of pans as proper contour, and the several plates of the 35 above described, obviously, inherently the two sections are then assembled with their greater weaknesses are developed at the joints ends in abutting relation, so as to produce a which form the connections between the seclaminated circular structure having stagtions that form the rim, and at the connecgered or broken joint connections between tions between the rim andbottom. the several plies which form the rim. The

4 In the working of heavy clays and other rim as herein shown comprises two plies of material, there is set up vibratory and twist-' wrought plates, an outer plate section 3 and ing strains by the mullers or rollersof the an inner or Iliner plate section at. Three or pan, which tend to loosen the joints and dismore plies of plates may be employed, as detort the pan, resulting in frequent repairs sired, without departing from my invention.

' and replacing of parts, 7 The joint between the outer run section or lamination is shown at and the joint of the inner lamination is shown at 6. 1 In case I of three laminations being'employed, the intermediate joint preferably would be disposed between the joints 5 and 6. As the joint forms the weakest portion of the completed rim a lap plate 7 is bolted to the outside of the outer rim plates to stiffen the joint, the. plate 7 being preferably bolted m thereto 'bycountersunk bolts ,8. The liner plates aredetachably connectedtothe cuter plates'3; byscr'ews or. bolts 9,-sd'that when the liner plates become worn they may be readily replaced without the necessity of discarding other portions of the pan struc ture.

In some pounds, as compared to cast rims of similar diameterwhich'weigh' about twenty-five hundred (2500) pounds. fFurthermore, when replacingthe cast rims,they'haveto be complet-elytorn oii, while in my rimit is only necr essary to take out the-screws 9 when replacing tpe outer. and inner 'plies. of. the rim are. S

a point above the'loweredge-of the outer ply, andf formin'g 1a shouldered recess 10 at the liner;* 1 V *7 Referringto Fig. 3 which is a typical cross sectional viewof the rim between joints,

n as bein of 1difierent heights the loweredge oft e innerply terminating at the lower edge of the rim which is. adapted to' receive a 'rib'or flangell'. vvThisarrangement also facilitates replacement of liners without "disturbing'the bottom. The-flange several bars are detachably iastenedtb the rim by screw bolts 13L .The flange llforms a shoulder upon which the bottom? 14a ofthe ll-i's shown as made up ofseveral a'rcuatelyshaped bars whoseends are inab'utting engagement at 1106. These bars are formed 40 preferably from steel stock by a cutting torch and bentin forming rolls to the desired shape 5 and have the beveled faces-I2. fThe pan seats. The peripheral edge ofthe 'biottom isapr'ovided with-a bevel face-15 which seatsuponthe'bevel face 12. 'Theconnection between therim. flange and the bottom as herein shown is devised primarily as 7 means to facilitate the makingof a welded connection between the rim and bottomf The weldfispreferably of spot weld character, at

various points along the beveled lap ofthe joint and may be made either from the in sideor theoutside of the pan;

"Instead of a welded 'oint between. the

7 flange 11 and the bottom, a bolted. connection may be employed, without greatlyinodify-f G0 thestru'cture: For instance, capscrews could beempl'o'yed to connect the bottom to the :fi'ange 11 or therparts; may 'be' keyed to one another toforma driving connection. I

' The invention'results' 1n. considerable saving in the maintenance and building of pans pan structures, the -will weigh only about eight hundred (800.)

of this type, as Worn liners can be readily replaced and the material from which the'rirn .is-formed may be bought in the open market and suitably formed by simple bending rolls, the supporting rim for the bottom being likewise formed in a simple manner by the flame cutting method. I v

A particular advantage arisesby reason of the beveled flange construction, as in this manner of forming the support or "connection for tl'lG'bOttOHl, therimmay be'separatelv and completely formed 'before.assembly .o n the bottom, and in the assembling of the parts, the may be aligned accurately so as to runtrue with thebas'e, without the necessity'otmaking a seat for the rim, as the *1 claim as my invention 1 1. A rindingfand mixing: pan bottom and a rimportio'n composed of a plurality' of sets 'of annularlyarranged plates assembled laminated relation, the adj acent yertic al edges of each: set of plates having abutting relation, the joints thusformed in one set of plates being cir'cumieren'tiall y bit"- set with respect to the joints of the other-set,

and means fordetachably conne'cti-ng' eachset of said platestogether'.-- f 7 1 2 A idin'gf and mixing panhavin a bottom and a rim portion composedoi a plurality of sets-of annularlyarranged plates assembled in laminated relation, the adjacent vertical edges of 'eachset of plateshavi-ng abutting relation, and means for" detachably connecting "each set of said plates together.

3. A -grinding and mixing pan composed of inner and outer plates arranged laminated re'lation, the outer plates extending to a point below the lower edge of the' inner I plates, "and v a flange member secured to the inner periphery of said outer plates and abutting against the lower edges of the inner '45. grlnding and mixing pancomposed' ,of in ner and outer plates arrangedin' lamiv nated relation, outer plates extending to 'af oint; below the lo wer edge of the inner :platespand ;;a flange-.member secured. to the innensperiphery 9f saidouter plates, and

abuttingagainst the lower edges oftheinner or plates, the said flange having a bevelled sar- 

